Overall wonderful experience at Tam's. Both Tam and her sister were very helpful and receptive during our whole stay. Excellent hosts!
The flat itself is great -- you can cook, it's quiet, safe, and there is a fan provided in the room so you don't have to always run the AC (and rack up your electricity bill).
Location is awesome -- in Ari area which is residential-ish but has loads of street food, restaurants and cafés within walking distance, two sky strain stations within 10 minute walk, two villa markets (upscale grocery stores with foreign products), a Big C (thai grocery store/everything you need store), 7-11s just at the corner...
We really enjoyed our stay here and would definitely stay again upon returning to Bangkok! Thank you Tam :)